[jira] Created: (PIG-1064) Behvaiour of COGROUP with and without schema when using "*" operator

[Viraj Bhat (JIRA)]

Behvaiour of COGROUP with and without schema when using "*" operator
--------------------------------------------------------------------

                 Key: PIG-1064
                 URL: https://issues.apache.org/jira/browse/PIG-1064
             Project: Pig
          Issue Type: Bug
          Components: impl
    Affects Versions: 0.6.0
            Reporter: Viraj Bhat
             Fix For: 0.6.0


I have 2 tab separated files, "1.txt" and "2.txt"

$ cat 1.txt 
====================
1       2

2       3

====================
$ cat 2.txt 

1       2

2       3

I use COGROUP feature of Pig in the following way:

$java -cp pig.jar:$HADOOP_HOME org.apache.pig.Main

{code}
grunt> A = load '1.txt';            
grunt> B = load '2.txt' as (b0, b1);
grunt> C = cogroup A by *, B by *;  
{code}

2009-10-29 12:46:04,150 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 
1012: Each COGroup input has to have the same number of inner plans
Details at logfile: pig_1256845224752.log
==========================================================

If I reverse, the order of the schema's
{code}
grunt> A = load '1.txt' as (a0, a1);
grunt> B = load '2.txt';            
grunt> C = cogroup A by *, B by *;  
{code}
2009-10-29 12:49:27,869 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 
1013: Grouping attributes can either be star (*) or a list of expressions, but 
not both.
Details at logfile: pig_1256845224752.log

==========================================================
Now running without schema??
{code}
grunt> A = load '1.txt';            
grunt> B = load '2.txt';            
grunt> C = cogroup A by *, B by *;
grunt> dump C; 
{code}

2009-10-29 12:55:37,202 [main] INFO  
org.apache.pig.backend.local.executionengine.LocalPigLauncher - Successfully 
stored result in: "file:/tmp/temp-319926700/tmp-1990275961"
2009-10-29 12:55:37,202 [main] INFO  
org.apache.pig.backend.local.executionengine.LocalPigLauncher - Records written 
: 2
2009-10-29 12:55:37,202 [main] INFO  
org.apache.pig.backend.local.executionengine.LocalPigLauncher - Bytes written : 
154
2009-10-29 12:55:37,202 [main] INFO  
org.apache.pig.backend.local.executionengine.LocalPigLauncher - 100% complete!
2009-10-29 12:55:37,202 [main] INFO  
org.apache.pig.backend.local.executionengine.LocalPigLauncher - Success!!

((1,2),{(1,2)},{(1,2)})
((2,3),{(2,3)},{(2,3)})
==========================================================

Is this a bug or a feature?

Viraj

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